ntu.ac.uk

Valid Email Server
Domain Lookup › ntu.ac.uk

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
ntu.ac.uk
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-18 06:01:45 UTC · ↺ Refresh

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MX Hostnames

  • ntu-ac-uk.mail.protection.outlook.com

MX Priorities

  • ntu-ac-uk.mail.protection.outlook.com: 0

A / AAAA Records

  • 2.58.104.10 (no PTR)

Mail Server IPs

  • 52.101.68.32 ↩ mail-db3pr0202cu00200.inbound.protection.outlook.com
  • 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
  • 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
  • 52.101.73.16 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::7 ↩ mail-db4pr02cu00307.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::9 ↩ mail-as8pr04cu00801.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::c ↩ mail-as8pr05cu00304.inbound.protection.outlook.com
  • 2a01:111:f403:ca04:: ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA dns0.ntu.ac.uk postmaster.ntu.ac.uk 2009114877 43200 7200 1209600 10800
Primary NS (mname)
dns0.ntu.ac.uk
Admin Email (rname)
postmaster@ntu.ac.uk
Serial
2009114877
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
10800s

Nameservers (NS)

ns1.ja.net
dns0.ntu.ac.uk
dns1.ntu.ac.uk

SPF Record

✓ Strict (-all)
v=spf1 include:_spf1.ntu.ac.uk include:_spf2.ntu.ac.uk include:_spf3.ntu.ac.uk include:_spf4.ntu.ac.uk include:_spf.salesforce.com include:spf.protection.outlook.com ip4:167.89.7.96 ip4:184.107.80.100/30 ip4:152.71.100.199 ip4:152.71.100.229 ip4:185.41.28.0/22 ip4:94.143.16.0/21 ip4:185.24.144.0/22 ip4:153.92.224.0/19 ip4:213.32.128.0/18 ip4:185.107.232.0/22 ip4:77.32.128.0/18 ip4:77.32.192.0/19 ip4:212.146.192.0/18 -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1;p=quarantine;pct=100;rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

18 records
  • google-site-verification=tpM1VSPjd0JxnDV82azMEBEcmIZhUcEwpefceUixqPU
  • vONfKptSGotgzsNdIHgO1X3x2pfj9yxQ5GC7WfPFnsEzVdnx+3eRj5ykM5/3eU4XEbdztwF7wtW3CR+J/+2fzA==
  • workplace-domain-verification=qUnHCkD87L3nWvfPq4DnpHeqvXMm5r
  • msfpkey=6zc08ci9ku1alw03svailenfn
  • _globalsign-domain-verification=H6ZpZYhJEP0xbq6J8V47NkLD59NA99KNfFD79rGvKy
  • 370F0B5AA3B1149E4B7BA036D27B5E86DB8244E29F279A9E6FEEA7C356B62951
  • jamf-site-verification=bUwskBTDcqgBbL4sdibhAA
  • apple-domain-verification=GD8o5262x12OLP79
  • GLAu0H6RU+Lv87ZHCvUgms+mw7Un8RlrVfzxDv8EGJcte+d3OJRnG0l0ZVXMq13o3oXt8xCK0tnTMl/cG4C94g==
  • globalsign-domain-verification=mjp3mboVpnc22gDvBwhtFGi1_zbfEdjw2_jPInZrc6
  • 50D75908AEBE64C905050975D096B7E0BD99DB6769C38DE6E68FFD050F690696
  • google-site-verification=5TmlWWmi5d5NLm1EHN_eqHpPBuonT6Z7gtTMgMKdJSs
  • pvuzlkfo/1N05avbRVuluHxqsJLqSfGYQSpJmJdG22D4YyrER6XFV2Kf9VjxaGbOyEV0yz3fXNeZXxed/CABnQ==
  • google-site-verification=-pCFxCJjuTjG9UqhZlELUbc5U7VtutktR67wnjYX5Wo
  • MS=ms52600687
  • adobe-idp-site-verification=c6b83e10d88946776564ddd39ba1934da88fadbabf69f14985e56c9d7cd2504a
  • SPFv=spf1 include:_spf1.ntu.ac.uk include:_spf2.ntu.ac.uk include:_spf3.ntu.ac.uk include:_spf4.ntu.ac.uk include:_spf.salesforce.com include:spf.protection.outlook.com ip4:167.89.7.96 ip4:184.107.80.100/30 ip4:152.71.100.199 ip4:152.71.100.229 ip4:185.41.28.0/22 ip4:94.143.16.0/21 ip4:185.24.144.0/22 ip4:153.92.224.0/19 ip4:213.32.128.0/18 ip4:185.107.232.0/22 ip4:77.32.128.0/18 ip4:77.32.192.0/19 ip4:212.146.192.0/18 -all
  • QuoVadis=e35e114a-9eb4-4136-9ef5-b5cb98da7d9d
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